ClimateMaster AG series Especificações descarregar pdf (Página 37)

ClimateMaster Geothermal Heat Pump Systems

All Products Technical Guide: 2008

Engineering Guide Speciﬁ cations

The coaxial water-to-refrigerant heat exchangers shall be designed

for close approach temperatures and be con struct ed of a convoluted

copper (optional cu pron ick el) inner tube and a steel outer tube. The

thermal expansion valves shall provide proper superheat over the entire

ﬂ uid temperature range with minimal “hunting”. The valve shall operate

bi-directionally without the use of check valves.

The water-to-re frig er ant heat exchanger and refrigerant suction lines

shall be insulated to prevent condensation at low liquid tem per a tures.

Fan Motor and Blower

The fan shall be a direct drive centrifugal type with a dynamically

balanced wheel. The housing and wheel shall be designed for quiet low

outlet velocity op er a tion and of galvanized steel con struc tion. Tight

fan housing geometry shall not be permitted. The fan housing shall be

removable from the unit without disconnecting the supply air ductwork

for servicing of the fan motor. The fan motor shall be an ECM variable

speed type. The ECM fan motor shall provide soft starting, maintain

constant CFM over its static operating range and provide airﬂ ow

adjustment on its control board. The fan motor shall be isolated from

the housing by rubber grom mets. The motor shall be permanently

lu bri cat ed and have thermal overload protection.

Electrical

CXM Control - A microprocessor-based compressor controller shall

be provided to monitor and control unit operation. The control shall

provide com pres sor and electric heater sequencing, high and low

pressure monitoring, ﬁ eld selectable water and air coil freeze protection

sensing, condensate overﬂ ow sensing, over/under voltage monitoring, and

unit performance sentinel (UPS). The control shall also provide for water

valve connection, a test mode, short cycle protection, random start-up,

as well as fault LED, fault mem o ry, and intelligent fault retry.

The control shall employ quick attach harness as sem blies for low

voltage connections to the control board to aid in troubleshooting or

replacement. An integral terminal block with screw ter mi nals shall be

provided on the control for all ﬁ eld low voltage connections. A circuit

breaker protected 75VA transformer shall be employed. Line voltage

box lugs shall be provided for unit wiring. Units shall have knockouts for

entrance of low and line voltage wiring. The fan motor and control box

shall be harness plug-connected for easy removal.

Residential models shall have a dual circut-breaker protected power block

for the connection of external ﬂ ow controller pump module.

Piping

Supply and return water connections, as well as Hot Water Generator

(desuperheater) connections shall be 1" IPT (Internal Pipe Thread)

brass swivel ﬁ ttings which provide a union and eliminate the need for

pipe wrenches and sealants when making ﬁ eld con nec tions. A thread

by sweat ﬁ tting shall be provided for connection to the water heater.

All water piping shall be in su lat ed to prevent condensation at low liquid

tem per a tures.

The condensate connection shall be a 3/4" PVC glue (socket) with

internal-trap (Vertical Models).

General

The water source heating/cooling units shall be vertical upﬂ ow air

discharge. Units shall be AHRI/ISO/ASHRAE 13256-1 (ground-source

closed-loop) per for mance cer ti ﬁ ed and listed by a nationally recognized

safety-testing lab o ra to ry or agency. Each unit shall be water run-tested

at the factory. Each unit shall be pallet mounted and shipped with

appropriate protective packaging to help avoid damage in transportation.

Units shall be warranted by the manufacturer against defects

in materials and workmanship for a period ten years on the

compressor and refrigerant circuit parts and ﬁ ve years on all

remaining parts, with a service labor allowance for the ﬁ rst ﬁ ve

years on the compressor and refrigerant circuit parts and two years

on all remaining parts. An optional extended labor warranty is

available which extends the service labor allowance to ten years for

the compressor and refrigeration circuit parts and ﬁ ve years on all

remaining parts.

The water source units shall be de signed to operate with entering ﬂ uid

tem per a ture between 20°F and 120°F.

Casing & Cabinet

The cabinet shall be fabricated from heavy-gauge galvanized steel

and painted with an epoxy powder coating. The interior shall be

insulated with 1/2" thick, multi-density, coated glass ﬁ ber. Insulation in

the air handler section shall be foil backed for ease of cleaning. Two

(vertical), one (horizontal) blower compartment and three compressor

compartment access panels shall be pro vid ed and shall be re mov able

with supply and return ductwork in place. The internal component layout

shall provide for major service with the unit in-place for re strict ed access

installations.

A duct collar (Field installed) shall be provided on the supply air opening.

2" high efﬁ ciency MERV11 pleated ﬁ lters shall be provided with each

unit. Units shall have ﬁ lter frames. The units shall have an insulated

divider panel between the air handling section and the com pres sor

section to minimize the transmission of compressor noise, and to permit

op er a tion al service testing without air bypass. Units shall be supplied with

left or right air inlet.

Refrigerant Circuit

All units shall contain EarthPure® (HFC 410A) sealed re frig er ant

circuit employing a hermetic motor-com pres sor, bidirectional thermal

expansion valve, ﬁ nned tube air-to-refrigerant heat exchanger, reversing

valve, coaxial tube water-to-refrigerant heat exchanger and service

ports. An optional Hot Water Generator (desuperheater) coil shall be

provided.

Compressors shall be Copeland UltraTech™ Two-Stage scroll type

designed for heat pump duty and mounted on spring vibration isolators.

Compressor motors shall be single phase PSC with internal over load

protection. A factory installed bidirectional ﬁ lter drier shall be provided

on all models. The ﬁ nned tube coil shall be sized for low-face velocity and

constructed of lanced aluminum ﬁ ns bonded to riﬂ ed copper tubes in

a staggered pattern not less than three rows deep. Entire air coil surface

shall be e-coated for corrosion protection.

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